curl -sL https://raw.githubusercontent.com/ai7778/ssh/main/f2b_set_port.sh | sudo bash
把你自己的 IP 加入白名单
nano /etc/fail2ban/jail.local
后面加你的公网 IP，空格分隔
ignoreip = 127.0.0.1/8 10.0.0.0/8 172.16.0.0/12 192.168.0.0/16 1.2.3.4
重启
systemctl restart fail2ban